A storage device includes a storage body having an opening and a lid for selectively opening and closing the opening of the storage body. The storage body has a light emitter and a power receiving portion connected to the light emitter. The lid has a power supplying portion, which is configured to supply power to the power receiving portion by the direct current resonance method. The light emitter emits light to interior of the storage body at a first luminance when the opening is closed by the lid. When the lid opens the opening so that the distance between the power receiving portion and the power supplying portion is reduced, the light emitter changes the luminance to a second luminance, which is different from the first luminance.